And... Papyrus fails to compile. This looks like a universal problem. There have been many update to CK since I last tried this stuff. Notepad++ fails. CK fails. This is stupid.

"C:\Projects\TESV\Build\PC\Papyrus compiler\PapyrusCompiler.exe" %1 -f="TESV_Papyrus_Flags.flg" -i="C:\Projects\TESV\Build\Source\DLC01\Scripts" -o="C:\Projects\TESV\Build\PC\Data\Scripts"
pause

That's the garbage from the compiler batch file. Should this be replaced entirely? 

cd %2"%~dp0PapyrusCompiler" %1 -f="TESV_Papyrus_Flags.flg" -i="%~dp0..\Data\Scripts\Source" -o="%~dp0..\Data\Scripts"pause

The Notepad++ setup wiki offers that. I don't know what to make of it.

You're missing the flag file in your scripts directory.

The flag file is in the scripts.rar archive in your data dir.

You might need to extract the SKSE archive and install it manually too, I think...

EDIT: Yep. http://www.loverslab.com/topic/45058-unable-to-find-flags-file-tesv-papyrus-flagsflg/

Well I'm sick again. All too common any more.

So now I'm guessing (since I found the archive) that I need to extract it to the scripts/source folder, overwrite anything, and then reinstall SKSE?

I believe that's right, yep.

OK. I'll get on it tonight.